Lead Software Engineer Python Java Jobs in London, UK

Professional job seekers finding United Kingdom jobs through Expertini
750,000+ professionals on Expertini 750,000+ Candidates
Join our global community
Expertini Penguin Mascot Resume Score™
Resume Score™ Instantly
Upload Your CV
Quick 30-second process

Apply Today & Jumpstart Your Career on Expertini, Trusted Since 2008.

Reset

Create Job Alert

 
   
Reset

Software Engineer SMS International London, UK

Software Engineer - SMS International Engineering London, UK About the Role As a Fullstack Software Engineer II joining the SMS International team you will be working with a team of 5 other colleagues to deliver RCS and SMS International expansion to meet the company’s objective ...

Senior Staff Software Engineer, Agentic Platform

Senior Staff Software Engineer, Agentic Platform United Kingdom Location: London, Bulgaria, Serbia and Lithuania About the role Tide is hiring a Senior Staff Software Engineer to lead the architecture of our agentic platform. You will shape the shared capabilit ...

Software Engineer, Safeguards Foundations (Internal Tooling)

Software Engineer, Safeguards Foundations (Internal Tooling) London, UK About Anthropic Anthropic’s mission is to create reliable, interpretable, and steerable AI systems. We want AI to be safe and beneficial for our users and for society as a whole. Our team is a quickly growin ...

Staff Software Engineer Engine by Starling

Overview At Engine by Starling, we are on a mission to find and work with leading banks all around the world who have the ambition to build rapid growth businesses, on our technology. Engine is Starling's software-as-a-service (SaaS) business, the technology that was built to power Starling, and ...

Backend Software Engineer (£80k) at InTouchNow.ai

Job Title Backend Software Engineer (£80k) Salary Up to £80k Company Description InTouchNow.ai – Award-winning healthcare technology company building AI voice agents for the NHS. Job Description Join a high-impact team building AI-powered voice agent ...

Senior Software Engineer: Scalable Node.js Backend

Caura.com is looking for a Senior Software Engineer to lead the development of their car management platform in London. As part of a high-agency team, you will architect scalable distributed systems using TypeScript and Node.js while collaborating with design and product teams. The ideal candidate has extensive ...

Senior Software Engineer, Accounting & Royalties Platform

Sony Music Entertainment China Ltd. seeks a Senior Software Engineer in London with over 8 years of experience. This role involves working on frontend applications using TypeScript, React, and GraphQL, alongside database technologies such as Neo4j and MySQL. The ideal candidate will contribute to product develop ...

Identity & FinCrime Software Engineer FinTech Security

Starling, the UK's leading digital bank, is seeking passionate engineers for their Customer Identity & Fincrime team. This role offers a hybrid working environment, requiring a minimum office attendance of one day per week. Engineers will work with technologies like Java, AWS, and Kubernetes to develop critical ...

Staff Software Engineer — Scale & Reliability (London)

Workonomics in London is seeking a Staff Software Engineer to join their high-impact Forward Engineering team. This role focuses on identifying and solving high-leverage technical problems across the organization rather than just delivering features for a single product. Candidates should have a proven track rec ...

Senior Software Engineer, Product Engineering, UK

Location UK Employment Type Full time Location Type Remote Department Engineering EMEA Engineering Compensation UK - London £112K – £137K • Offers Equity UK £103K – £126K • Offers Equity Please ...

Senior Software Engineer, Mobile iOS (UK)

About Us Powered by one of the largest global newsrooms in sports media, The Athletic brings sports fans the most comprehensive stories about the teams, sports and athletes they love. The Athletic’s newsroom of 450+ full-time staff delivers in-depth coverage of hundreds of professional and college ...

Senior Mission Software Engineer: Connected Warfare

A defense technology company is seeking a Mission Software Engineer to architect systems and solve technical problems. Ideal candidates will have a strong engineering background, experience with various programming languages, and a desire to create impactful software solutions. This role offers competitive benef ...

Senior Mobile Engineer Software engineering London

About the Role Checkout.com is on a mission to transform the shopping experience for millions of consumers. As a senior individual contributor in mobile, you’ll help design and build the products we put in the hands of our end users. Working hand-in-hand with our engineering team and prod ...

Senior Backend Software Engineer Application Development

A World-Changing Company Palantir builds the world’s leading software for data-driven decisions and operations. By bringing the right data to the people who need it, our platforms empower our partners to develop lifesaving drugs, forecast supply chain disruptions, locate missing children, and mor ...

Low Latency E Trading Software Engineer

Job Overview Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping s ...

Full Stack Software Engineer (Platform & Cloud

Full Stack Software Engineer (Platform & Cloud) Location: London (Hybrid - 2 days onsite) An exciting opportunity for a Full Stack Software Engineer to join a fast‑growing London technology design consultancy building next‑generation cloud and platform solutions for an array of different ...

Data Driven Software Engineer (AI & Analytics)

Aurum Search Limited is seeking a Software Engineer based in Greater London. The successful candidate will lead the design and delivery of sophisticated data solutions, partnering with technical and non-technical teams. A Bachelor's degree in a STEM subject and SQL skills are essential for the role. This positio ...

Staff Software Engineer, Games, Inception, DeepMind

Minimum qualifications Bachelor’s degree in Computer Science, Mathematics, or equivalent practical experience. 8 years of experience in one or more programming languages (e.g., C++, Python, or JavaScript). Experience leading technical strategy across multi-disciplinary t ...

Senior Software Engineer MSX Compute Workflows

Description & Requirements Imagine building the platform that powers infrastructure for 9,000+ Bloomberg engineers worldwide — managing a fleet of over 110,000 servers across Bloomberg's global datacenters. Every service, every product that Bloomberg clients rely on runs on infrastructure managed ...

Senior Software Engineer/SRE TRAX Observability

Location London Business Area Engineering and CTO Reference Number About TRAX TRade Automation and eXecution (TRAX) is part of Bloomberg Enterprise Products Engineering. We build trade automation solutions and multiple Execution Management Systems ( ...

Senior Software Engineer Data Snapshot (CASS)

Location London Business Area Engineering and CTO Ref # Description & Requirements Bloomberg’s data powers global financial markets, so making it fast, reliable, and accessible is critical. The Data Platform teams enable application teams and conten ...

Senior Software Engineer, AI Scheduling (Remote)

black.ai is seeking a Senior Engineer to work on the Optimization team in a fully remote environment. The role includes implementing functional software solutions to enhance scheduling capabilities, collaborating with cross-functional teams, and focusing on full-stack development. Applicants should have at least ...

AI/Software Engineer up to £100k

We’ve partnered with a fast-growing B2B AI company embedding intelligence directly into enterprise workflows. Think: handling sensitive data, automating complex decisions, and solving real operational problems. What you’ll be doing Building AI agents for extraction, reasoning & summ ...

Software Engineer, AI Centre of Excellence

How You'll Make An Impact Partner with product managers, non-technical business users and engineers to research, validate, and deliver high-impact Generative AI use cases Design and build user-facing products that leverage AI capabilities for optimizing internal workflows with a f ...

Software Engineer (AI, API & Hospitality Tech)

If you fancy a cool, easy-going atmosphere full of dynamic and spirited individuals, you are at the right place. We are on the lookout for passionate, optimistic and fun-loving people to join our big family of Wonderful People. With our wide array of hotels and brands, there are countless opp ...

Mission Engineer, Software — Field Deployments & AI

CHAOS Industries seeks a Mission Engineer in Greater London to deploy technology solutions and integrate machine learning applications. You will work closely with engineering teams, test products in the field, and provide valuable feedback. Ideal candidates have a technical background in areas such as Computer S ...

Senior Software Engineer – AI / Agentic Systems

Senior Software Engineer – AI / Agentic Systems London (Hybrid) We’re partnering with a cutting-edge AI startup redefining how intelligent systems operate at scale. Their mission is ambitious: to push the boundaries of agentic AI and build platforms that automate complex, multi-step human ...

Staff Machine Learning Software Engineer, Research

Overview PhysicsX is a deep-tech company with roots in numerical physics and Formula One, dedicated to accelerating hardware innovation at the speed of software. We are building an AI-driven simulation software stack for engineering and manufacturing across advanced industries. By enabling high-fi ...

Senior Algo Trading Software Engineer (VP)

## Senior Algo Trading Software Engineer (VP)Applyremote type: Hybridlocations: London United Kingdomtime type: Full timeposted on: Posted Todayjob requisition id: **Discover your future at Citi**Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 de ...

Senior Algo Trading Software Engineer (VP)

Discover your future at Citi Job Overview Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in over 180 countries at a scale few can match. ...

Senior Software Engineer, Edge CDN & CloudFront

Amazon Web Services (AWS) is seeking a Senior Software Development Engineer to join its Cloudfront team in London. This role involves leading engineering efforts and collaborating in an agile environment to build and enhance scalable systems. Candidates should have strong programming skills, experience with vari ...

Principal Software Engineer 3 month contract

This is a contract role for 3 months, starting in May ideally. At Collinson, we don’t just build technology — we power the experiences behind some of the world’s most recognised travel, financial services, and retail brands. Our solutions help global brands acquire, engage, and retain milli ...

Staff Software Engineer (Optimizely Analytics, Backend)

Introduction Optimizely Analytics is the industry leading warehouse native analytics platform. We are used by Canva, Grammarly, Alaska Airlines, and many more to unlock data-driven decisions for experiment analysis, product analytics, sales analytics and beyond. You will work in a small, nimble t ...

Senior Software Engineer, Developer Relations & Community

Expedia, Inc. in Greater London is seeking a talented individual contributor with a strong engineering background to lead complex, vaguely defined projects and mentor junior engineers. The ideal candidate will have over 8 years of experience, with skills in technical design and operational excellence. This role ...

Remote Bilingual Software Engineer Documentation Reviewer

Mercor is seeking a Bilingual Software Engineer proficient in Chinese, Japanese, or Ukrainian to work remotely. This role requires at least 2 years of software engineering experience and a bachelor's degree in a relevant field. The successful candidate will review technical documents, provide structured feedback ...

Senior Software Engineer AI Native Platforms

Senior Software Engineer – AI Native Platforms Function: Technology Location: Hybrid, London or Peterborough office Some of the Great Things You’ll Do Lead the design and development of services that support AI agent interaction Drive the application of G ...

Senior Software Engineer: Enabling Teams (Hybrid)

Ebury, a leading FinTech firm in London, is seeking a Senior Software Engineer. This hybrid position involves designing and deploying high-quality software solutions while collaborating with cross-functional teams. The ideal candidate will have over 7 years of experience, a strong academic background, and skills ...

Senior Software Engineer Autonomous Behavior Planning

AeroVect is seeking a Senior Software Engineer to design and build behavior planning systems for autonomous vehicles. The role involves developing algorithms, collaborating with teams, and conducting testing. Candidates should have proficiency in modern C++ and Python, a Master’s in a related field, and at least ...

Senior Software Engineer, Product Engineering, UK

Hi I’m Abhik, Ashby’s Co-Founder and VP of Engineering. We’re looking for an ambitious full‑stack engineer who is laser‑focused on solving customer problems and making the right long‑term investments to solve them not only today but in our future features and products. Responsibilities ...

Senior Software Engineer, Autonomous Behavior Planning

AeroVect Technologies Inc. is seeking an experienced Senior Software Engineer to design and implement behavior planning systems for autonomous vehicles. The ideal candidate will have a Master’s degree in Computer Science or Robotics and at least 3 years of industry experience. Proficiency in C++ and Python is es ...

Principal Software Engineer Front End/ React

Principal Frontend Engineer (React / TypeScript) Front Office Technology We’re hiring a Principal Frontend Engineer to join a Front Office Technology team at a leading investment management firm. The role sits directly alongside portfolio managers and quantitative researcher ...

Staff Software Engineer, Product Engineering, UK

About the Role Our engineering culture strives to create an environment where engineers own and deliver product features end‑to‑end, from research through design to implementation. As a product engineer, you will write product specs, create wireframes, and build the product with minimal oversight ...

Software Engineer Data Driven Sales Tools

A leading technology company is seeking a Software Engineer to develop innovative data-driven products. You will work on cloud applications, building high-performance solutions, directly influencing sales operations. The ideal candidate should possess strong Python skills, AWS experience, and knowledge of contai ...

Test and Commissioning Engineer Electrical & Software

Test and Commissioning Engineer - Electrical & Software Full-time Allye Energy is revolutionising the energy storage sector with our cutting‑edge Battery Energy Storage Systems (BESS) built using repurposed EV batteries. We are seeking a Commissioning Specialist to joi ...

Software Engineer, Platform London, United Kingdom

The mission of Speechify is to make sure that reading is never a barrier to learning. Over 50 million people use Speechify’s text-to-speech products to turn whatever they’re reading – PDFs, books, Google Docs, news articles, websites – into audio, so they can read faster, read more, and remember mo ...

Software Engineer (Fast Shipping Builder) — London

Software Engineer (Fast-Shipping Builder) — London Corgi Insurance Published: April 27, 2026 Corgi Insurance is hiring a Fast Engineer in London. Builders who ship. About Corgi: AI-powered insurance company built for tech startups. $108M raised. Regulatory approval as a li ...

Software Engineer II Global Banking Platform

Job Description Be an integral part of a team that's constantly pushing the envelope to enhance, build, and deliver top‑notch technology products. As a Software Engineer II at JPMorgan Chase within the Global Banking Platform (GBP), you will help the team enhance, build, and deliver trust ...

Software Engineer II Cloud Banking Platform

J.P. MORGAN seeks a Software Engineer II to join their Global Banking Platform team in Greater London. The role involves designing and developing scalable microservices while applying best practices and technologies like Go, Python, and Kubernetes. Ideal candidates have hands-on experience in application develop ...

Staff Software Engineer Compiler & Performance (Onsite)

A leading technology firm in London is seeking a key contributor for software and compiler development. This role involves optimising computational environments and enhancing execution speed for advanced hardware. Candidates should have expertise in Python and C++, along with experience in machine learning. This ...

Software Engineer Early Stage start up

Overview Be part of building an AI-powered platform designed to simplify and enhance billing practices for law firms. By leveraging Large Language Models (LLMs) and machine learning, the concept automates and refines billing descriptions, ensures compliance with client and regulatory standards, an ...

🚀 Boost Your Hiring Chances with Our AI-Powered Tool-Kit

Stand out from thousands of applicants. Use our proven career tools to optimize your applications and land your dream job faster.

To-Do Planner

Organize your job search and personal tasks. All data is confidential.

Open Planner

Wellbeing Center

Access your confidential wellness report and resources to manage job search stress.

Check Wellbeing

Skill Coach

Plan your skill development with O*NET support to stay competitive in your field.

Start Coaching

Outfit Helper

Get AI-powered suggestions on what to wear for your next interview.

Find Outfit

Income Tax Calculator

Plan your finances with our calculator, updated for 2025 tax regulations.

Calculate Tax

Salary Benchmark

Get accurate, AI-supported salary trends to know your worth and negotiate better.

Check Salaries

Interview Practice

Practice for any interview with AI-enabled Q&A sessions. All data is private.

Start Practicing

Interview Predictor

Use our AI-supported tool to predict potential interview questions based on your resume.

Predict Questions

Interview Practice Timer

Use our mock interview trainer to perfect your answers under timed conditions.

Start Timer

Behavioral Mastery

Ace tricky behavioral interviews with our AI-powered practice module.

Master Answers

Question Journal

Confidentially record interview questions you were asked for future reference.

Open Journal

Interview Ace

A comprehensive tool to help you master every aspect of your interviews.

Become an Ace

Q&A Logs

Confidentially track your answers to common questions and refine them over time.

View Logs

Application Planner

Schedule and organize your job applications in one confidential planner.

Open Planner

Cover Letter Tool

Create perfect, tailored cover letters for each application with AI support.

Generate Letter

Resume Score

Get instant feedback on your resume with our NLP-supported analysis tool.

Check My Score

ATS Score

Check your resume's compatibility with Applicant Tracking Systems (ATS).

Check ATS Score

Application Analyzer

Use AI to analyze job descriptions and optimize your application materials.

Analyze Application

Career Visualizer

Confidentially plan and visualize your long-term career path and goals.

Visualize My Career

Offer Genius

Get intelligent insights and strategies to confidently negotiate job offers.

Negotiate Offers

JobFlow

Track your entire job search progress from application to offer with this intelligent tool.

Track My Flow

JobSense

Our intelligent matching engine that provides smart job recommendations.

Get Smart Matches

Networking Toolkit

Tools to build and manage your professional connections. All data is confidential.

Build Network

Professional CV

A classic, O*NET supported template for corporate and professional roles.

Use This Template

Executive CV

A premium, O*NET supported template designed for senior and C-level positions.

Use This Template

Modern CV

A fresh, stylish, O*NET supported template perfect for tech and modern industries.

Use This Template

Creative CV

A visually distinct, O*NET supported template for design and artistic roles.

Use This Template

Minimalist CV

A clean, simple, O*NET supported template that focuses purely on content.

Use This Template

Europass CV

The standard European Union recommended format for wide compatibility.

Use This Template

Student CV

An institution-recommended template perfect for internships and first jobs.

Use This Template

Graduate CV

An institution-recommended template for recent graduates entering the workforce.

Use This Template

Academic CV

The researcher-recommended format for roles in academia and research.

Use This Template

Developer/IT CV

A tech-savvy recommended template to highlight your technical skills.

Use This Template

Skilled Worker CV

A trades-recommended template to showcase hands-on skills and experience.

Use This Template

Monochrome CV

A sleek, black-and-white, O*NET supported template for a professional look.

Use This Template

Art CV

An artist-recommended template that allows your creativity to shine.

Use This Template

Harvard CV

A researcher-recommended template based on the classic Harvard format.

Use This Template

Volunteer Research

Help us improve our platform by joining our community research program.

Join Research

Review Us

Share your experience with our tools to help other job seekers.

Share Experience

Register

Create your free account to save jobs, build your profile, and track applications.

Create Account

Login

Access your dashboard, manage applications, and continue your job search.

Access Your Account

Profile Builder

Create a comprehensive professional profile that attracts recruiters and showcases your skills.

Build Your Profile

View Profile

See your public profile exactly as employers will see it. Make sure it's perfect.

Preview Profile

Bookmarked Jobs

Keep track of all your saved job opportunities in one organized place.

View Saved Jobs

Your Reviews

View and manage all the company reviews you've submitted.

See Your Reviews

Following

Manage the list of companies you follow to stay updated on their new openings.

Manage Following

Find Companies

Discover and research top employers in your country and industry.

Discover Employers

Standalone CV Builder

Use our O*NET supported CV builder to create a professional resume from scratch.

Build Your CV

PDF to DOC (Beta)

Convert your PDF resumes or documents into editable Word (DOC) format.

Convert PDF

DOC to PDF (Beta)

Create universally compatible PDF documents from your Word (DOC) files.

Create PDF

General FAQ

Find answers to common questions about our job site and platform.

Read FAQ

Job Seekers FAQ

Get help and find answers to questions specifically for job seekers.

Get Help

Job Matching

Learn about the technology and algorithms behind how we match you to jobs.

Learn How

Personalized Matching

Discover how we use your profile and activity to provide customized job suggestions.

Learn More

Quick Apply

Understand our fast application process and how to make the most of it.

Learn More

Alert Frequency

Learn how to manage your job alert settings so you get the updates you want.

Manage Settings

Job Alerts Guide

A complete guide to understanding how job alerts work and how to use them effectively.

Read Guide

Resume Matching

Learn how our system matches your resume to job requirements.

Learn More

Ethical Branding

Read our guide to building a professional and ethical personal brand.

Read Guide

Candidate Visibility

Learn how to increase your visibility to recruiters on our platform.

Increase Visibility

Verified Badge

Find out how you can get a verified badge to build trust with employers.

Get Verified

AI ATS Technology

Learn about the advanced AI and ATS technology that powers our platform.

Learn More

ATS Ranking

Understand how Applicant Tracking Systems rank you as an applicant.

Learn More

Semantic Matching

Learn how our AI-powered semantic matching goes beyond keywords.

Learn More

    Lead Software Engineer Python Java Jobs in London Job Search Guide, Trends and Insights